Elastomeric Suspension System Skateboard Truck

ABSTRACT

The Elastomer Suspension System Skateboard Truck is designed for general use in all styles of skateboarding. This skateboard truck differs from conventional skateboard trucks by incorporating an elastomer suspension system. This suspension system is calculated to diminish or eliminate all forces associated with sudden or rapid motions. By downgrading these extreme shock forces the skateboard has more control and is therefore, more maneuverable. This stability will be of great advantage to both professional and amateur skateboarders alike.

BACKGROUND OF INVENTION

[0001] This skateboard truck is a new configuration of my previously designed skateboard truck the Pneumatic Compression Strut Skateboard Truck, U.S. Pat. No. 6,224,076 as of May 1, 2001. This new devise is an improvement upon the formally patented skateboard truck suspension system technology, by further advancing the balance stability of the skateboard truck. Additionally, the new design consists of a suspension system which includes components that are easily interchangeable, giving the rider the ability to customize the truck response according to their weight and riding ability. This equates to advanced maneuverability with respect to superior steering stability and therefore steering ease.

SUMMARY OF INVENTION

[0002] The invention claimed is a skateboard truck intended for use in all categories of general skateboarding. This skate-board truck diverges from traditional skateboard trucks by incorporating an elastomer suspension system.

[0003] The suspension system utilizes two constant rate compression elastomer shock absorbers, which are bilateral and equidistant between the hanger and base plate of the skateboard truck. These constant rate compression elastomer shock absorbers significantly suppress and eliminate shock forces associated with all styles of skateboarding. This permits more direct movement of the skateboard truck to dramatically enhance guiding stability and therefore guiding control. This design allows customization of truck response with easily interchangeable shock absorbers. Further, the shock absorber design can be produced with a molded or cast process, thus improving the manufacturability of the assembly.

BRIEF DESCRIPTION OF DRAWINGS

[0004]FIG. 1 is a rear perspective view of the Elastomer Suspension System skateboard truck showing our new design and structure thereof;

[0005]FIG. 2 is a front perspective view of the Elastomer Suspension System skateboard truck, showing our new design and structure thereof;

[0006]FIG. 3 is a rear view of the skateboard truck. This view depicts both constant rate compression elastomer shock absorbers and their attachment to the truck hanger and base, as well as, the pivot assembly utilizing constant rate compression elastomer bushings around the pivot pin thereof;

[0007]FIG. 4 is a right side view showing the constant rate compression elastomer shock absorber mounted between the truck hanger and truck base. This view further represents the pivot assembly utilizing constant rate compression elastomer bushings around the pivot pin thereof;

[0008]FIG. 5 is a left side view showing the constant rate compression elastomer shock absorber mounted between the truck hanger and the truck base This view further represents the pivot assembly utilizing constant rate compression elastomer bushings around the pivot pin thereof;

[0009]FIG. 6 is a front view of the skateboard truck delineating the connection of the constant rate compression elastomer shock absorbers between the skateboard truck hanger and the base plate thereof;

[0010]FIG. 7 is a top view of the skateboard truck thereof;

[0011]FIG. 8 is a rear view of the skateboard truck base plate outlining the orientation of the constant rate compression elastomer shock absorbers conically shaped mounting studs thereof;

[0012]FIG. 9 is a rear view of the skateboard truck hanger, which portrays the constant rate compression elastomer shock absorbers mounting studs and the hanger stabilizer thereof;

[0013]FIG. 10 is a cross sectional view of the left side of the skateboard truck renders both constant rate compression elastomer bushings secured by the pivot pin and hex nut, forming the pivot assembly between the skateboard truck hanger and base plate thereof;

[0014]FIG. 11 is a perspective view of the constant rate compression shock absorber thereof;

[0015]FIG. 12 is a cross sectional view of the constant rate compression elastomer shock absorber showing both conically shaped shock absorber mounting orifices.

DETAILED DESCRIPTION

[0016] The following is the detailed fabrication narrative of the Elastomer Suspension System Skateboard Truck. The truck is for attachment and use on all standard skateboard decks. This skateboard truck differs by all previous designs of skateboard trucks, by incorporating an easily interchangeable elastomer suspension system. This elastomer suspension system substantially reduces or eliminates the extreme impact shock forces related to all types of skateboarding. In addition, the elastomer suspension system provides enhanced control and maneuverability of the skateboard. Elastomer shock absorbers of various hardness, or density, can easily be interchanged to provide optimization of truck response according to a rider's weight and ability.

[0017] The skateboard truck hanger shall be cast from aluminum or other suitable metallurgical alloy. The hanger includes the fundamental body (2), which has raised conically shaped absorber mounting studs (4) (6) that are central to the circular recessed elastomer shock absorber retention cutouts (8) (14), which are bilateral and equidistant from one another. Non-slipping axle with extended axle terminal end studs (16) (18), pivoting stabilizer (20) extending perpendicular from the horizontal axis of the dorsal surface of the fundamental body (2). A semicircular through-holed aperture yolk (22), extending radial and perpendicular to the horizontal axis of the posterior surface of the fundamental body (2), for means of mounting both ventral and dorsal shock absorbing bushings (74) (78), providing a pivot joint for the hanger assembly and securing the hanger to the base plate (70).

[0018] The skateboard truck axle (24) shall be machined from various metallurgical alloys and orientated central to the horizontal axis of the fundamental body (2) of the hanger. The axle terminal end studs (16) (18) shall be die threaded to accommodate skateboard wheels and secured by means of hexagonal jam lug nuts (26) (28).

[0019] The skateboard truck base plate (70) shall consist of a raised cast through-holed attachment socket (30) where the pivot fastener (32) is inserted through for means of attaching and securing the hanger to the base plate. Cutouts will be cast into the base plate directly under the elevated elastomer shock absorber mounting platforms (34) (36) to reduce excess mass to the base plate. Bilateral and equidistant on each elevated elastomer shock absorber mounting platform, shall be one each of a raised conically shaped elastomer shock absorber mounting studs (38) (40). Through-holes shall be machined drilled in each corner of the base plate, with one in each corner of the posterior end of the base plate (42) (44) and two in each corner of the anterior end of the base plate (46) (48) (50) (52) to facilitate attachment of the base plate and truck assembly to a skateboard deck. In the center posterior portion of the base plate is a recessed interlocking socket (54), inserted with a constant rate compression elastomer cup (56), providing a pivot joint on which the pivoting stabilizer of the hanger will rotate.

[0020] The skateboard truck will employ two elastomer shock absorbers (58) (60) and will be fabricated from various densities of elastomers to facilitate customization of the suspension system. The elastomer shock absorbers are cylindrical along their vertical axis and being spherically formed at the midpoint. They are opened at either end with conically fashioned mounting orifices (62) (64), which makes possible the mounting and securing the elastomer shock absorbers to the raised conically shaped elastomer shock absorber mounting studs (4) (6) (38) (40) of both the skateboard truck hanger and the base plate.

[0021] The pivot fastener (32) shall be a button head cap screw of standard size and produced from suitable metallurgical materials. One end of the pivot pin will be die threaded to secure the skateboard truck assembly (68) to the skate-board truck base plate (70) by means of a hexagonal jam nut (76). The pivot fastener (32) is inserted all the way through the lower constant rate compression elastomer bushing retention washer (72), ventral elastomer shock absorbing bushing (74), semicircular through-holed aperture yolk (22), dorsal elastomer shock absorbing bushing (78) upper constant rate compression elastomer bushing retention washer (80), and finally through the raised cast through-holed attachment socket (30) where the die threaded end will be secured by the hexagonal jam nut (76) flush with the anterior surface of the base plate (70).

[0022] The Elastomer Suspension System Skateboard Truck is now fully assembled (10) and ready to be mounted to a skateboard deck. 

What is claimed is:
 1. An elastomer suspension system skateboard truck comprising a. A hanger including a fundamental body with a semi-circular through-holed aperture yolk, single horizontally orientated axle, including threaded end portions which extend outward from the terminal ends of the hanger for means of attaching wheels, extending outwardly and perpendicular from the anterior dorsal surface of the fundamental body of the hanger is a pivoting stabilizer on which the hanger rotates to control and guide the hanger. b. The base plate including two elevated elastomer shock absorbing mounting platforms which are bilateral and equidistant from the center line of the baseplate, where each elevated elastomer shock absorber mounting platform consists of a single raised cast conically shaped elastomer shock absorber mounting stud for the purpose of attaching and securing the elastomer shock absorbers to the base plate.
 2. The skateboard truck of claim 1, in which on the dorsal surface of the hanger bilateral and equidistant from the center line of the semicircular through-holed aperture neck of the hanger are single raised cast conically shaped shock absorber mounting studs central to the elastomer shock absorber circular recessed retention cutout, for the purpose of attaching and securing the elastomer shock absorbers to the hanger.
 3. The skateboard truck of claim 2, where the semicircular through-holed yolk, which is radial from and perpendicular to the hanger fundamental body, will accept a pivot pin and two constant rate elastomer bushings; one dorsal and one ventral to the semicircular through-holed aperture yolk for securing the hanger to the base plate where the hanger will rotate upon the pivot pin.
 4. The skateboard truck of claim 3, where the pivot pin will be inserted and rotated through the lower constant rate compression elastomer bushing retention washer, into the posterior portion of the ventral surface of the lower constant rate compression elastomer bushing, exiting through the anterior end of the lower constant rate compression elastomer and entering the posterior portion of the semicircular through-holed aperture yolk, exiting the anterior surface of the semicircular through-holed aperture yolk into the posterior portion of the ventral surface of the upper constant rate compression elastomer bushing, exiting through the anterior portion of the upper constant rate elastomer bushing, passing through the upper constant rate compression elastomer bushing retention washer and terminating in the raised through-holed attachment socket, where a threaded hexagonal jam nut will be attached securing the pivotal junction.
 5. The skateboard truck of claim 4, where central to the anterior portion of the ventral surface of the base plate will be a recessed interlocking socket consisting of a constant rate compression elastomer cup, where the pivoting stabilizer of the hanger will engage the base plate producing a terminal pivot joint, which will facilitate ease and stability of the rotation of the hanger assembly enhancing steering maneuverability, and in addition, absorb associated impact forces to the pivoting stabilizer.
 6. The skateboard truck of claim 1, in which six through-holed apertures with two located in each corner of the posterior end of the base plate and two through-holed apertures in each corner of the anterior end of the base plate for securing the skateboard truck base plate and assembly to a skateboard deck.
 7. The skateboard truck of claim 1, where constant rate compression elastomer shock absorbers of the suspension system, are cylindrically shaped along their vertical axis, being spherical in shape at the midpoint and open at either end with conically formed mounting orifices for inserting the constant rate compression elastomer shock absorber over the raised conically shaped elastomer shock absorber mounting studs located on both the hanger and base plate, and will be fabricated from various densities of elastomers. The shock absorbers are of such length and shape that when installed to the opposing shock mounting studs, the shocks are compressed slightly to produce a pre-load condition. This is for the purpose of a retaining method to keep the elastomer shock in position when separation of hangar and base occurs.
 8. The skateboard truck of claim 7, shall have the mounting orifice of one end of a constant rate compression elastomer shock absorber inserted over and mounted to the raised conically shaped shock absorber mounting stud that is situated on one of the elevated elastomer shock absorber mounting platforms of the base plate.
 9. The skateboard truck of claim 8, shall have the mounting orifice of one end of another constant rate compression elastomer shock absorber inserted over and mount to the laterally opposite raised conically shaped elastomer shock absorber mounting stud that is situated on the opposite elevated elastomer shock absorber mounting platform of the base plate.
 10. The skateboard truck of claim 8, where the shock absorber mounting orifice of the opposite end of the constant rate compression elastomer shock absorber shall be inserted over and mounted to the raised conically shaped elastomer shock absorber mounting stud and secured in the circular recessed shock absorber retention cutout of the hanger.
 11. The skateboard truck of claim 9, where the opposite end of the other shock absorber's mounting orifice shall be inserted over and mounted to the laterally opposite raised conically shaped elastomer shock mounting stud and secured in the opposite circular recessed shock absorber retention cutout of the hanger.
 12. The skateboard truck of claim 1, where the axle terminal studs shall be tap threaded to appropriate size to accommodate the mounting standard skateboard wheels. 